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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').

19137 results found.

  1. GRB981226, BeppoSAX Christmas GRB
  2. GRB 981226 - Infrared Observations
  3. GRB 981226 optical observations
  4. GRB 981220
  5. GRB 981220, radio observations
  6. GRB 981220, radio observations
  7. GRB981220 I-band Observations
  8. GRB981220 Optical Observations
  9. GRB 981220
  10. GRB 981220 Optical Observations
  11. GRB 981220, optical observations
  12. GRB 980326/Host Galaxy
  13. GRB980329 R,I flux calibration and R,I,K upper limits
  14. GRB980425 Optical Follow-up
  15. GRB980425: X-ray revised positions
  16. GRB 980923 BATSE Observations
  17. SGR1900+14, BeppoSAX-GRBM observations
  18. GRB980703 Very Long Baseline Interferometry
  19. GRB970508 optical observations
  20. GRB971214, association with a Galactic star?
  21. Optical Observations of the Host Galaxy of GRB 980519
  22. GRB980519, Optical Observations
  23. GRB980703, Host galaxy multicolor photometry
  24. GRB 980703 (NFI observations)
  25. GRB980703 optical photometry
  26. GRB 980703: BATSE Observations
  27. GRB980703 optical observations
  28. GRB980703: Radio transient
  29. GRB980703 H-band Observations
  30. GRB 980703: Spectrum of the proposed optical counterpart
  31. GRB980703: Spectrum of the proposed optical counterpart
  32. GRB980613 Optical Observations
  33. GRB980703 (I band observations)
  34. GRB 980703 H-band Observations
  35. GRB980703 (optical R observations)
  36. GRB980703: radio source/optical transient
  37. BeppoSAX NFI observations of GRB 980703
  38. Radio observations of SGRs
  39. SGR1900+14 field optical observations
  40. GRB 980613 Near-IR observations
  41. GRB980613, optical observations
  42. GRB 980613: Optical transient and its host galaxy
  43. SGR1627-41, RXTE/ASM observations
  44. GRB 980613: Detection of the probable host galaxy
  45. Reduced error box of SGR 1627-41
  46. GRB 980613: BATSE Observations
  47. GRB 980613 Optical Observations
  48. GRB 980613 optical observations
  49. Discovery of a new SGR source, SGR1627-41
  50. GRB980613 Optical Observations
  51. GRB980613 observations from Palomar
  52. GRB 980613 new optical/IR observations
  53. GRB 980613 optical/IR obs.
  54. GRB980613 Near Infra-Red Observations
  55. GRB971214 Secondary Standards
  56. SGR 1900+14
  57. GRB980519 Secondary Standards
  58. SGR1900+14
  59. SGR1900+14
  60. GRB 980519 Optical Observations
  61. GRB980519 optical observations
  62. GRB980519 I-band observations
  63. GRB 980519
  64. GRB980519 optical observations
  65. GRB 980519 Optical Observations
  66. GRB980519 BATSE Observations
  67. GRB980519 optical observations
  68. GRB980519 Optical Observations
  69. GRB980519 Optical Observations
  70. GRB980519 Optical Observations
  71. GRB 980519 Optical Observations
  72. GRB980519 optical observations
  73. GRB 980425 Brightness Temperature
  74. BSAX Observations of GRB980425 field
  75. GRB980425 BATSE observations
  76. SAX J0840.7+2248 Optical Observations
  77. GRB 980425 optical observations
  78. GRB980425: optical obs.
  79. GRB980425: Radio Observations
  80. GRB 980425 optical observations
  81. report on BSAX observations of GRB980425
  82. GRB 980425 optical observations
  83. GRB980326 X-ray Observations
  84. GRB980326, optical observations
  85. GRB980326, optical observations
  86. GRB980329, Fading IR counterpart to radio source
  87. GRB980329
  88. GRB980329 Keck K-band observations
  89. GRB980329 sub-millimeter observations
  90. GRB980329 optical observations
  91. GRB980329 near-IR observations
  92. GRB980329 near-IR observations
  93. GRB980329 optical observations
  94. GRB980329 infrared observations
  95. GRB980329 optical observations
  96. GRB980326 optical observations
  97. GRB980329 optical observations
  98. GRB980329 VLA observations
  99. GRB980329 near IR observations
  100. GRB980329 optical observations

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